231437136 has 80 divisors (see below), whose sum is σ = 692019200. Its totient is φ = 65280384.

The previous prime is 231437123. The next prime is 231437153. The reversal of 231437136 is 631734132.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22185 + ... + 30903.

It is an arithmetic number, because the mean of its divisors is an integer number (8650240).

Almost surely, 2^231437136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231437136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346009600).

231437136 is an abundant number, since it is smaller than the sum of its proper divisors (460582064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231437136 is a wasteful number, since it uses less digits than its factorization.

231437136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8816 (or 8810 counting only the distinct ones).

The product of its digits is 9072, while the sum is 30.

The square root of 231437136 is about 15213.0580752195. The cubic root of 231437136 is about 613.9660384332.

The spelling of 231437136 in words is "two hundred thirty-one million, four hundred thirty-seven thousand, one hundred thirty-six".